| 摘要 |
<p>PURPOSE:To prevent the working of a theft alarm circuit when a user is staying in a car, by actuating said circuit on a load under a predetermined level at least at a driver's seat. CONSTITUTION:An operation switch 3 is provided at least on the driver's seat of a car. This switch 3 is so constituted that two sheet type electric conductors 4 as a pair are separated up and down and opposed to each other, surrounded by an elastic material 5. And when an outside force has reached a point above a predetermined level, both metal sheets 4 are made to contact each other for closing the operation switch 3. Also, one end of the operation switch 3 is connected to a power source +Vcc and the other end thereof two resistance R and the input end of an inverter circuit 8. On the other hand, an output from the inverter circuit is transmitted to the base of a switching transistor as inserted in the power feed part of a theft alarm circuit 9. As a result, the working of the operation switch 3 actuates the theft alarm circuit 9.</p> |
